Consider a uniform sphere that has mass and radius . The gravitational energy of an isotropic sphere is given by so using we obtain

The energy is given by and defining we obtain

where . So

Using we can write

.

Where and we focus on the function , the plot is given by

The function looks like a circle. Note that and – so we consider – the plot is given by

We therefore propose .

The total energy is given by

We assume that and that is constant in time, then we obtain

where So

The solution is given by

Or using and we can write

Then and . So we obtain

A plot of the radius of the universe in time:

And a plot of the speed of the radius of the universe in time:

The radius is accelerating at the beginning. Is it possible that we are just at the beginning of the universe so that the expansion is still accelerating?

Here we have just used special relativity. The total energy of the universe in this model simply is zero (kinetic energy is positive – but the gravitational energy is negative) – so before the ‘big bang’ there was simply nothing – not energy – no matter and no time.

### Like this:

Like Loading...

*Related*

i love it